Articles image src change because of lazyloading

A few days ago, we added image lazyload on articles images to improve page speed performance. However, it has a harmful impact on customizations. We reverted the change, but we still want to deploy this change.
Now, we added both src and data-src.

On 27. 7., we remove src and re-enable lazyload.

Here is the change:
Now:

<div class="image">
    <a href="/blog/kdyby-pod-balonky-nebyla-syte-zelenkava-trava/" title="Kdyby pod balónky nebyla sytě zelenkavá tráva">
        <img src="https://cdn.myshoptet.com/usr/classic.shoptet.cz/user/articles/images/pexels-tolga-aslant__rk-11012486cr.jpg" alt="Kdyby pod balónky nebyla sytě zelenkavá tráva" data-src="https://cdn.myshoptet.com/usr/classic.shoptet.cz/user/articles/images/pexels-tolga-aslant__rk-11012486cr.jpg">
    </a>
</div>

After:

<div class="image">
    <a href="/blog/kdyby-pod-balonky-nebyla-syte-zelenkava-trava/" title="Kdyby pod balónky nebyla sytě zelenkavá tráva">
        <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt="Kdyby pod balónky nebyla sytě zelenkavá tráva" data-src="https://cdn.myshoptet.com/usr/classic.shoptet.cz/user/articles/images/pexels-tolga-aslant__rk-11012486cr.jpg">
    </a>
</div>

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